
class Counter {
    public int count=0;
    public void add() {
        synchronized (this) {
            count++;
        }
    }

//    public static void func() {
//        synchronized (Counter.class) {
//
//        }
//    }
}

public class SynchronizedMethod {
    public static void main(String[] args) throws InterruptedException {
        Counter counter=new Counter();
        Thread t1=new Thread(()->{
           for(int i=0;i<50000;i++){
               synchronized (counter) {
                   counter.add();
               }
           }
        });
        Thread t2=new Thread(()->{
            for(int i=0;i<50000;i++){
                synchronized (counter) {
                    counter.add();
                }
            }
        });
        t1.start();
        t2.start();
        t1.join();
        t2.join();
        System.out.println("count="+counter.count);

    }
}
